CHA₂DS₂-VASc Score

Estimate ischemic stroke risk in non-valvular atrial fibrillation/flutter to support anticoagulation decisions.

Inputs

Sex Sex category adds 1 point for female sex (risk modifier).

Age (years)

Congestive heart failure/LV dysfunction

Hypertension

Diabetes mellitus

Prior stroke/TIA/systemic embolism

Vascular disease (MI/PAD/aortic plaque)

—

Enter age and select risk factors.

Estimated annual stroke risk—

General anticoagulation guidance—

Disclaimer: For educational purposes only. Not a substitute for clinical judgment. Guidance is simplified; follow local guidelines and individualize risk/benefit (bleeding risk, patient values, etc.).

Scoring

CHF/LV dysfunction: +1
Hypertension: +1
Age ≥ 75: +2
Diabetes: +1
Stroke/TIA/systemic embolism: +2
Vascular disease: +1
Age 65–74: +1
Sex category (female): +1

Clinical pearls

Intended for non-valvular AF (not mechanical valves; moderate–severe mitral stenosis has different management).
Anticoagulation decisions should incorporate bleeding risk, contraindications, and shared decision-making.

References

Lip GYH, et al. Refining clinical risk stratification for predicting stroke and thromboembolism in AF. Chest. 2010.
ESC Guidelines for AF (2020) and AHA/ACC/HRS AF guidelines (updates) for anticoagulation thresholds.